Pregnant Gyllenhall engaged to Sarsgaard

Maggie Gyllenhaal and Peter Sarsgaard are engaged and expecting a baby, her publicist said today.

It will be the first marriage for both actors, who have been dating for four years.

No other information was released.

Screen credits for 28-year-old Maggie Gyllenhaal include 'Donnie Darko', co-starring her brother, Jake Gyllenhaal.

Meanwhile, her 35-year-old fiance starred alongside Jake in last year's war drama 'Jarhead'.